Hey fellow Planeswalkers! When it comes to deck-building in Magic: The Gathering Arena, it’s all about finding the right balance between spells, creatures, and lands. Make sure your deck has a clear game plan and synergy between the cards. Don’t forget to include some removal spells and card draw to maintain control and consistency in your matches. And always playtest your deck to see how it performs against different strategies. Keep tweaking and refining your deck to stay ahead of the competition! Good luck out there on the battlefield!